Cable cleaner
Technical Field
The utility model relates to the technical field of cable cleaning, in particular to a cable cleaner.
Background
Cables are widely used for long-distance transportation of electric power and play a vital role in the power grid. For cables for long distance transmission, twisted-wire cables are generally adopted, and the cables not only ensure certain section in electrical performance, but also have certain flexibility in mechanical performance.
When the stranded wire type cable needs to be recycled, as the stranded wire type cable is placed outdoors for a long time, certain sundry dust exists in the stranded wire structure, so that the flexibility of the stranded wire type cable is affected, and the using effect of the stranded wire type cable is affected; the conventional cable is cleaned by adopting a conveying mode to remove sundries on the outer side surface of the cable, but the cleaning mode is time-consuming and labor-consuming, and the cable cannot be cleaned comprehensively.
The utility model patent with the publication number of CN216988779U discloses a cable cleaning device for municipal engineering, and the technical scheme is that water in a water tank is sprayed out through a spray head by arranging a water pump to flush a cable, so that the problems of time and labor waste in manual cleaning are solved; however, the following problems remain unsolved in the above technical solutions: 1. the device utilizes water flow to flush the cable, the situation that the cable cannot be thoroughly flushed is avoided, the stranded cable is placed outdoors for a long time, the adhesion of impurities attached to the outer side surface of the stranded cable is tight, and the common flushing cleaning effect is poor; 2. the equipment can not clear up the stranded wire gap of stranded wire type cable for stranded wire type cable clearance is not thorough.
Disclosure of Invention
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a cable cleaner, includes the main frame, and the rope subassembly is all installed to main frame top left and right sides, installs respectively on the main frame and erodees subassembly, scraping subassembly, erodees the subassembly, scraping the subassembly and all is located between two receipts rope subassemblies, and scrapes the subassembly and be located and wash the subassembly right side.
The flushing assembly comprises a flushing support frame arranged on the main frame, a guide roller is arranged in the middle of the left side of the flushing support frame, a flushing support disc is arranged on the right side of the guide roller, carrier roller grooves are formed in four sides of the flushing support frame, and a supporting roller tangential to the outer circle of the flushing support disc is arranged in the carrier roller grooves.
The washing support plate is characterized in that a plurality of sliding rails pointing to the circle center of the washing support plate are arranged on the left end face of the washing support plate, a plurality of washing blocks are connected to the sliding rails in a sliding mode, one ends of the washing blocks are of square structures which are connected to the sliding rails in a sliding mode, the other ends of the washing blocks are of arc structures, one ends of the square structures, far away from the arc structures, are provided with positioning cylinders, the arc structures of the washing blocks are arranged close to the circle center of the washing support plate, two ends of the arc structures of the washing blocks are provided with T-shaped arc grooves, movable brush strips are arranged in the two T-shaped arc grooves in a sliding mode, the movable brush strips are arranged in the T-shaped arc grooves through return springs, a cleaning liquid storage tank is arranged on the left side of the washing blocks, mounting lugs are arranged on the right end face of the washing support plate, power conversion rods are arranged at positions, corresponding to the circle center of the washing support plate, threaded holes are formed in the front side faces of the mounting lugs, the threaded holes penetrate through square holes on the mounting lugs, and positioning bolts are arranged in the threaded holes.
The scraping assembly comprises a scraping support frame arranged on the main frame, a positioning roller set is arranged on the left side of the scraping support frame, two sponge rollers which are arranged in a mirror image mode in the vertical direction are arranged on the right side of the scraping support frame, the positioning roller set is also arranged on the left side of the sponge rollers, three bending guide rollers are arranged on the scraping support frame and are positioned between the left side positioning roller set and the right side positioning roller set, one bending guide roller positioned in the middle is positioned on the rear side of the other two bending guide rollers, and scraping execution blocks are arranged on the outer sides of the two bending guide rollers on the right side.
As a preferable technical scheme of the utility model, the scraping execution block is arranged close to one side of the transmission direction of the cable on the bending guide roller, the scraping execution block comprises fixed plates arranged on the upper side and the lower side of the scraping support frame, the fixed plates are provided with scraping installation blocks towards the direction of the corresponding bending guide roller, one side of each scraping installation block, which is far away from the fixed plate, is arc-shaped, an arc-shaped clamping groove is formed in the arc-shaped surface, movable installation blocks are connected in the arc-shaped clamping groove in a sliding manner, the movable installation blocks are arranged on the side wall of the arc-shaped clamping groove through sliding springs, and one surface, which is far away from the fixed plate, of each movable installation block is provided with a hairbrush block, and the hairbrush blocks are connected with the movable installation blocks through floating springs.
As a preferable technical scheme of the utility model, the positioning roller set consists of two positioning rollers which are distributed front and back, the two ends of the upper end and the lower end of the scraping support frame, which correspond to the positioning rollers at the front side of the left end, are respectively provided with a kidney-shaped groove, the positioning rollers at the front side of the left end are arranged on the front side wall of the kidney-shaped groove through adaptive springs, the positioning rollers at the rear side of the right end, which correspond to the upper end and the lower end of the scraping support frame, are also provided with kidney-shaped grooves, and the positioning rollers at the rear side of the right end are also arranged on the rear side wall of the kidney-shaped groove through adaptive springs.
As a preferable technical scheme of the utility model, the sponge roller comprises a sponge installation rod arranged at the rear side of the scraping support frame, water-absorbing sponge sleeves are arranged on the sponge installation rod, annular pits are arranged in the middle of the two water-absorbing sponge sleeves, and the cross section of each annular pit is semicircular.
As a preferable technical scheme of the utility model, rolling balls are arranged on the sides, far away from each other, of the two water-absorbing sponge sleeves, the rolling balls are tightly pressed against the water-absorbing sponge sleeves, and the diameter of the rolling balls is larger than that of a semicircle of the annular concave section on the water-absorbing sponge sleeves.
As a preferable technical scheme of the utility model, a plurality of sharp-nose bars are arranged on one side of the power conversion bar, which is close to the circle center of the flushing support disc, and the position between the power conversion bar and the mounting convex block can be adjusted by a positioning bolt.
As a preferable technical scheme of the utility model, the side surface of the brushing block, which is close to the circle center of the flushing support disc, is provided with flexible bristles, the side of the movable brushing strip, which is close to the circle center of the flushing support disc, is also provided with flexible bristles, and the flexible bristles on the brushing block and the flexible bristles on the movable brushing strip are arranged in a staggered manner.
As a preferable technical scheme of the utility model, the guide roller comprises a fixed shaft fixed on the front side and the rear side of the flushing support frame, two wheel linings are arranged in the middle of the fixed shaft, a wear-resistant sleeve is arranged between the wheel linings, and a baffle is horizontally arranged on the wheel linings below the wear-resistant sleeve.
The utility model has the beneficial effects that: 1. the flushing assembly adopted by the utility model can carry out omnibearing flushing and brushing on cables with different diameters, so that the problem that stubborn dirt on the cables cannot be thoroughly flushed is effectively solved, and when the cables with different diameters are cleaned, the positioning cylinder stretches and contracts to drive the movable brush strip to move inwards and outwards, so that the structure formed by the movable brush strip and the flushing block can carry out omnibearing flushing on cables with different types; in addition, the cleaning liquid storage tank sprays cleaning liquid, and the outer surface of the cable is cleaned by brushing in cooperation with the brushing block and the movable brushing strip.
2. The power conversion rod can convert the left-to-right force of the cable into the power for rotating the specific flushing support disc, the sharp-end rod is used for being conveniently clamped into the twisted wire thread-shaped gap of the cable, the cable moves rightwards, and the whole flushing support disc is driven to rotate by the thread-shaped gap on the surface of the twisted wire at the moment through the sharp-end rod, so that the automatic rotation can be completed without increasing the driving of rotation.
3. The scraping assembly can bend stranded wires, the bending guide roller is used for bending the wires, the bent stranded wire gaps can be propped up, the scraping execution block brushes the stranded wire gaps at the moment to clean dirt in the stranded wire gaps, in addition, the wires can be prevented from being inclined after passing through the positioning roller group, and the sponge roller can dry the cleaned and scraped wires to prevent the wires from being rusted due to residual cleaning liquid on the wires.
Drawings
The utility model will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic view of the left side end face structure of the flushing assembly of the present utility model.
FIG. 3 is a schematic illustration of the mating relationship of the present utility model between a brush block, movable brush bar and positioning cylinder.
Fig. 4 is a schematic view of the right side end face structure of the flushing assembly of the present utility model.
Fig. 5 is a schematic view of the wiper assembly of the present utility model.
Fig. 6 is an enlarged view at I of fig. 5.
Fig. 7 is a schematic view of the structure of the scraping execution block of the present utility model.
FIG. 8 is a schematic illustration of the mating relationship between a brush block and a movable mounting block of the present utility model.
Fig. 9 is a schematic view of the structure of the sponge roller of the present utility model.
In the figure: 1. a main frame; 2. a rope collecting component; 3. flushing the assembly; 31. flushing the supporting frame; 311. a carrier roller groove; 312. a support roller; 32. a guide roller; 321. a fixed shaft; 322. a wheel lining; 323. a wear-resistant sleeve; 324. a baffle; 33. flushing the support plate; 331. a slide rail; 332. mounting the protruding blocks; 333. positioning bolts; 34. a brushing block; 341. a T-shaped arc groove; 342. a movable brush bar; 343. a return spring; 344. a cleaning liquid storage tank; 345. a flexible bristle; 35. a power conversion lever; 351. a sharp-tipped rod; 36. a positioning cylinder; 4. a scraping assembly; 41. scraping the supporting frame; 411. a kidney-shaped groove; 412. adapting to a spring; 42. a positioning roller set; 421. a positioning roller; 43. a sponge roller; 431. a sponge mounting rod; 432. a water-absorbing sponge sleeve; 433. rolling the ball; 44. a scraping execution block; 441. a fixing plate; 442. scraping the mounting block; 443. an arc-shaped clamping groove; 444. a movable mounting block; 445. a sliding spring; 446. a brush block; 447. a floating spring; 45. and bending the guide roller.
Detailed Description
Embodiments of the present utility model are described in detail below. The following examples are illustrative only and are not to be construed as limiting the utility model. The examples are not to be construed as limiting the specific techniques or conditions described in the literature in this field or as per the specifications of the product.
Referring to fig. 1, a cable cleaner comprises a main frame 1, wherein rope collecting assemblies 2 are respectively arranged on the left side and the right side above the main frame 1, a flushing assembly 3 and a scraping assembly 4 are respectively arranged on the main frame 1, the flushing assembly 3 and the scraping assembly 4 are respectively positioned between the two rope collecting assemblies 2, and the scraping assembly 4 is positioned on the right side of the flushing assembly 3; the flushing component 3 adopted by the utility model can flush and scrub the cable, so that the problem that the stubborn dirt on the cable cannot be thoroughly flushed is effectively solved; the rope collecting component 2 can automatically wind the cable, so that the manual burden is greatly reduced; the scraping assembly 4 adopted by the utility model can bend stranded wires, the bent stranded wire gaps can be propped open, and brushing is performed on the stranded wire gaps at the moment to clean dirt in the stranded wire gaps, so that the problem that the stranded wires cannot be thoroughly cleaned in the gaps is solved.
Referring to fig. 2-4, the flushing assembly 3 includes a flushing support frame 31 mounted on the main frame 1, a guide roller 32 is mounted in the middle of the left side of the flushing support frame 31, a flushing support disc 33 is mounted on the right side of the guide roller 32, carrier roller grooves 311 are formed in four sides of the flushing support frame 31, and a carrier roller 312 tangential to the outer circle of the flushing support disc 33 is mounted in the carrier roller grooves 311; the left end face of the flushing supporting plate 33 is provided with a plurality of sliding rails 331 pointing to the circle center of the flushing supporting plate 33, the sliding rails 331 are connected with a plurality of flushing blocks 34 in a sliding manner, one end of each flushing block 34 is of a square structure which is connected with the sliding rails 331 in a sliding manner, the other end of each flushing block 34 is of an arc structure, one end of each square structure far away from the arc structure is provided with a positioning cylinder 36, the arc structure of each flushing block 34 is close to the circle center of the flushing supporting plate 33, both ends of each flushing block 34 are provided with T-shaped arc grooves 341, movable brush strips 342 are slidably arranged in the two T-shaped arc grooves 341, the movable brush strips 342 are arranged in the T-shaped arc grooves 341 through return springs 343, a cleaning liquid storage tank 344 is arranged on the left side of each flushing block 34, the right end face of each flushing supporting plate 33 is provided with a mounting lug 332, the position of each mounting lug 332 corresponding to the circle center of the flushing supporting plate 33 is provided with a power conversion rod 35, the front side face of each mounting lug 332 is provided with a threaded hole, the threaded hole penetrates through the square hole on the mounting lug 332, the threaded hole is internally provided with a positioning bolt 333, one side of each power conversion rod 35 close to the circle center of the flushing supporting plate 33 is provided with a plurality of pointed heads 351, and the power conversion rods can be positioned between the power conversion rods 35 and the power conversion rods 333 can be adjusted by the positioning bolts 333.
The flushing component 3 adopted by the utility model can perform omnibearing flushing and brushing on cables with different diameters, thereby effectively solving the problem that the stubborn dirt on the cables cannot be thoroughly flushed; specifically, when the cable comes out from the left end rope collecting assembly 2, the cable passes through the flushing support disc 33 through the positioning of the guide roller 32, the brushing block 34 and the movable brush bar 342 are pushed to a proper position along the sliding rail 331 by the positioning cylinder 36, when the diameter of the cable is smaller, the distance that the movable brush bar 342 moves towards the center of the flushing support disc 33 is increased by the positioning cylinder 36, the end parts of the adjacent two movable brush bars 342 are contacted and mutually abutted, so that the movable brush bar 342 is retracted along the T-shaped arc groove 341 and synchronously compresses the return spring 343, and when the positioning cylinder 36 is retracted, the return spring 343 pushes the movable brush bar 342 back to the original position; after the brushing block 34 and the movable brush bar 342 are pushed to the proper positions, the locating bolts 333 on the mounting convex blocks 332 are unscrewed, the sharp head rod 351 on the power conversion rod 35 is propped against the thread-shaped gap on the surface of the stranded wire, then an external motor driving the right rope collecting assembly 2 to rotate is started, so that the cable moves rightwards, at the moment, the thread-shaped gap on the surface of the stranded wire drives the whole flushing support disc 33 to rotate through the sharp head rod 351, and the whole flushing support disc 33 can be driven to rotate without great force because of the supporting roller 312 in the supporting roller groove 311, meanwhile, the cleaning liquid is sprayed out from the cleaning liquid storage tank 344, the outer surface of the cable is scrubbed by matching with the brushing block 34 and the movable brush bar 342, and the cleaning liquid is a common cable cleaning agent on the market, and belongs to the prior art, such as trichloroethane type cleaning agents.
It should be noted that, the power conversion rod 35 can convert the left-to-right force of the cable into the power for rotating the specific flushing support disc 33, the tip rod 351 is used to conveniently clamp into the twisted wire thread-shaped gap of the cable, and the twisted wire thread-shaped gap on the surface of the twisted wire moves rightwards through the cable, and the tip rod 351 drives the whole flushing support disc 33 to rotate, so that the utility model can complete automatic rotation without increasing the driving of rotation.
Referring to fig. 2, the guide roller 32 includes a fixed shaft 321 fixed on the front and rear sides of the washout supporting frame 31, two wheel liners 322 are disposed in the middle of the fixed shaft 321, a wear-resistant sleeve 323 is installed between the wheel liners 322, a baffle 324 is horizontally installed on the wheel liner 322 below the wear-resistant sleeve 323, the wear-resistant sleeve 323 on the guide roller 32 cooperates with the baffle 324 horizontally installed on the wheel liner 322 to position the cable which just comes out of the left-side rope collecting assembly 2 and swings left and right, so that the cable can just pass through the round mouth in the middle of the washout supporting disc 33.
Referring to fig. 2-3, the side of the brushing block 34, which is close to the center of the washing support plate 33, is provided with flexible bristles 345, the side of the movable brush bar 342, which is close to the center of the washing support plate 33, is also provided with flexible bristles 345, and the flexible bristles 345 on the brushing block 34 and the flexible bristles 345 on the movable brush bar 342 are staggered, which has the advantage that the cables can be brushed without dead angles no matter whether the movable brush bar 342 is contracted or not.
Referring to fig. 5-9, the scraping assembly 4 includes a scraping support frame 41 mounted on the main frame 1, a positioning roller set 42 is mounted on the left side of the scraping support frame 41, two sponge rollers 43 disposed in mirror image in the up-down direction are mounted on the right side of the scraping support frame 41, a positioning roller set 42 is also mounted on the left side of the sponge rollers 43, three bending guide rollers 45 are mounted on the scraping support frame 41 and between the left and right positioning roller sets 42, one bending guide roller 45 in the middle is located on the rear side of the other two bending guide rollers 45, and scraping execution blocks 44 are mounted on the outer sides of the two bending guide rollers 45 on the right side; the positioning roller set 42 is used for further determining the position of the cable, preventing the cable from being askew, the sponge roller 43 can dry the cable after cleaning and scraping, the bending guide roller 45 is used for bending the cable, the twisted wire gap after bending can be opened, and the scraping execution block 44 brushes and wipes the twisted wire gap at the moment to clean dirt in the twisted wire gap; it should be noted that the cable paths in the scraping assembly 4 are as follows: when the cable enters the scraping assembly 4, the cable firstly passes through the left positioning roller set 42, reaches the front side surface of the left first bending guide roller 45, then winds to the rear side surface of the left second bending guide roller 45, winds to the front side surface of the left third bending guide roller 45, passes through the right positioning roller set 42, and finally passes out from between the two sponge rollers 43; specifically, when the cable passes through the scraping assembly 4 according to the path, the strand gap of the part of the cable passing through the rear side surface of the left second bending guide roller 45 and the front side surface of the left third bending guide roller 45 is stretched due to bending, and at this time, the scraping execution block 44 starts brushing the strand gap to clean dirt in the strand gap, and when passing through the sponge roller 43, the water is wiped by the relative movement of the cable and the sponge roller 43.
Referring to fig. 7-8, the scraping execution block 44 is disposed near one side of the bending guide roller 45 in the cable transmission direction, the scraping execution block 44 includes a fixed plate 441 mounted on the upper and lower sides of the scraping support frame 41, the fixed plate 441 is provided with a scraping installation block 442 toward the direction of the corresponding bending guide roller 45, one side of the scraping installation block 442 away from the fixed plate 441 is arc-shaped, an arc-shaped slot 443 is provided on the arc-shaped surface, a movable installation block 444 is slidingly connected in the arc-shaped slot 443, the movable installation block 444 is mounted on the side wall of the arc-shaped slot 443 through a sliding spring 445, a brush block 446 is mounted on one side of the movable installation block 444 away from the fixed plate 441, and the brush block 446 is connected with the movable installation block 444 through a floating spring 447; when the cable passes through the corresponding position of the scraping execution block 44 from left to right, the movable installation block 444 in the arc-shaped clamping groove 443 on the scraping installation block 442 moves rightwards along with the cable due to the contact of the hairbrush block 446 and the cable, meanwhile, the sliding spring 445 is compressed to a certain extent and then bounces back, the movable installation block 444 is driven to return to the original position, the hairbrush block 446 is driven by the movable installation block 444 to scrape the cable in a left-right circulation mode, and the floating spring 447 can ensure that the hairbrush block 446 is tightly attached to the cable.
Referring to fig. 5-6, the positioning roller set 42 is composed of two positioning rollers 421 distributed in front and back, two ends of the upper and lower ends of the scraping support frame 41 corresponding to the positioning rollers 421 at the front side of the left end are respectively provided with a kidney-shaped slot 411, the positioning rollers 421 at the front side of the left end are mounted on the front side wall of the kidney-shaped slot 411 through adaptive springs 412, the positioning rollers 421 at the rear side of the upper and lower ends of the scraping support frame 41 corresponding to the rear side of the right end are also provided with kidney-shaped slots 411, and the positioning rollers 421 at the rear side of the right end are also mounted on the rear side wall of the kidney-shaped slot 411 through adaptive springs 412; the size of the middle gap between the two positioning rollers 421 can be adjusted by the adaptive springs 412 in the waist-shaped grooves 411, so that cables with different diameters can be conveniently adapted; the kidney 411 corresponding to the left and right positioning roller groups 42 is installed at different positions, and the kidney 411 is required to be installed according to the moving direction of the positioning roller 421 that is not affected by the cable pressure, because the positioning roller 421 that is affected by the cable pressure in the left and right positioning roller groups 42 is the rear positioning roller 421, and the positioning roller 421 that is affected by the cable pressure in the right positioning roller group 42 is the front positioning roller 421, but the positioning roller 421 that is affected by the cable pressure cannot have a moving degree of freedom.
Referring to fig. 9, the sponge roller 43 includes a sponge mounting rod 431 mounted at the rear side of the scraping support 41, a water absorbing sponge sleeve 432 is mounted on the sponge mounting rod 431, the middle parts of the two water absorbing sponge sleeves 432 are respectively provided with an annular recess, the cross sections of the annular recesses are semicircular, rolling balls 433 are mounted at the sides of the two water absorbing sponge sleeves 432 far away from each other, the rolling balls 433 are tightly pressed against the water absorbing sponge sleeves 432, and the diameter of the rolling balls 433 is larger than that of the semicircular cross section of the annular recess on the water absorbing sponge sleeves 432; the rolling ball 433 is used for pressing out water in the water-absorbing sponge sleeve 432, and the annular recess in the middle of the water-absorbing sponge sleeve 432 can enlarge the contact area with the cable, so that the water-absorbing effect is stronger; specifically, when the cable passes between the sponge rollers 43, the water-absorbing sponge cover 432 wipes off the water attached to the cable, the cable moving rightward drives the water-absorbing sponge cover 432 to rotate around the sponge mounting rod 431, and the water-absorbing sponge cover 432 passes through the rolling balls 433 and the rolling balls 433 squeeze out the water in the water-absorbing sponge cover 432.
The utility model has the following steps of: firstly, when a cable comes out of the left end rope collecting assembly 2, the cable passes through the flushing support disc 33 through the positioning of the guide roller 32, the brushing block 34 and the movable brush bar 342 are pushed to a proper position along the sliding rail 331 through the positioning cylinder 36, when the diameter of the cable is smaller, the distance that the movable brush bar 342 moves towards the center of the flushing support disc 33 is increased through the positioning cylinder 36, the end parts of two adjacent movable brush bars 342 are contacted and mutually abutted, the movable brush bar 342 is retracted along the T-shaped arc groove 341 and synchronously compresses the return spring 343, and when the positioning cylinder 36 is retracted, the return spring 343 pushes the movable brush bar 342 back to the original position; after the brushing block 34 and the movable brush bar 342 are pushed to the proper positions, the locating bolts 333 on the mounting convex blocks 332 are unscrewed, the sharp head rods 351 on the power conversion rods 35 are propped against the thread-shaped gaps on the surfaces of the stranded wires, then an external motor driving the right rope collecting assembly 2 to rotate is started, so that the cables move rightwards, at the moment, the thread-shaped gaps on the surfaces of the stranded wires drive the whole flushing support disc 33 to rotate through the sharp head rods 351, and the supporting rollers 312 in the supporting roller grooves 311 are used for driving the whole flushing support disc 33 to rotate without great force, meanwhile, the cleaning liquid is sprayed out from the cleaning liquid storage tanks 344, and the outer surfaces of the cables are brushed cleanly in cooperation with the brushing block 34 and the movable brush bar 342.
Secondly, when the cable enters the scraping assembly 4, the cable firstly passes through the left positioning roller set 42, reaches the front side surface of the left first bending guide roller 45, then winds to the rear side surface of the left second bending guide roller 45, winds to the front side surface of the left third bending guide roller 45, passes through the right positioning roller set 42, and finally passes out from between the two sponge rollers 43; specifically, when the cable passes through the scraping assembly 4 according to the path, the twisted wire gap of the part of the cable passing through the rear side surface of the left second bending guide roller 45 and the front side surface of the left third bending guide roller 45 is stretched due to bending, at this time, the scraping execution block 44 starts brushing the twisted wire gap to clean dirt in the twisted wire gap, when the cable passes through the sponge roller 43, the cable and the sponge roller 43 wipe water to dry and then enter the right end rope collecting assembly 2, the cable moving rightward drives the water absorbing sponge sleeve 432 to rotate around the sponge mounting rod 431, and the water absorbing sponge sleeve 432 passes through the rolling ball 433 and simultaneously the rolling ball 433 extrudes water in the water absorbing sponge sleeve 432.
While embodiments of the present utility model have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model, which is also intended to be covered by the present utility model.